(19)

(11)

EP 3 973 406 A1

(12)

(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 21715534.0 (22) Date of filing: 24.03.2021

(51) International Patent Classification (IPC):  G06F 15/173(2006.01) (52) Cooperative Patent Classification (CPC): G06F 15/17381; G06F 15/17318; G06F 15/17387 (86) International application number: PCT/EP2021/057563 (87) International publication number: WO 2021/191272 (30.09.2021 Gazette 2021/39)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 26.03.2020 GB 202004430 30.04.2020 GB 202006402 (71) Applicant: Graphcore Limited Bristol BS1 2PH (GB)	(72) Inventor: KNOWLES, Simon Bristol, Bristol BS1 2PH (GB) (74) Representative: Driver, Virginia Rozanne et al Page White & Farrer Bedford House John Street London WC1N 2BF London WC1N 2BF (GB)